A. above 100Kv
B. below 33Kv
C. any voltage level hv or ehv
D. none of above
Answer: C. any voltage level hv or ehv
Explanation:
Post Type Insulator :
- Post insulators are similar to Pin insulators, but post insulators are more suitable for higher voltage applications.
- Post insulators have a higher number of petticoats and a greated height compared to pin insulators. We can mount this type of insulator on supporting structure horizontally as well as vertically. The insulator is made of one piece of porcelain and it has clamp arrangement are in both top and bottom end for fixing.
Pin Insulator
- It is generally used up to 33KV system
- It is single stage
- Conductor is fixed on the top of the insulator by binding
- Two insulators cannot be fixed together for higher voltage application
- Metallic fixing arrangement provided only on bottom end of the insulator
Post Insulator
- It is suitable for lower voltage and also for higher voltage
- It can be single stag as well as multiple stags
- A conductor is fixed on the top of the insulator with help of connector clamp
- Two or more insulators can be fixed together one above other for higher voltage application
- Metallic fixing arrangement provided on both top and bottom ends of the insulator